body{
  margin: 100px;
}
p{
  font-size: 80px;
}
button{
  width: 50px;
  height: 30px;
  line-height: 21px;
  margin-right: 10px;
  border-radius: 5px;
  font-size: 20px;
  vertical-align: middle;
}
.increment{
  background-color: #E62C2A;
}

.multiply{
  line-height: 0;
  background-color: #E62C2A;
}
